/*
* This is the function that actually highlights a text string by
* adding HTML tags before and after all occurrences of the search
* term. You can pass your own tags if you'd like, or if the
* highlightStartTag or highlightEndTag parameters are omitted or
* are empty strings then the default <font> tags will be used.
*/

function doHighlight(bodyText, searchTerm, highlightStartTag, highlightEndTag) {
    // the highlightStartTag and highlightEndTag parameters are optional
    if ((!highlightStartTag) || (!highlightEndTag)) {
        highlightStartTag = "<span class=\"dictionaryWord\">";
        highlightEndTag = "</span>";
    }

    // find all occurences of the search term in the given text,
    // and add some "highlight" tags to them (we're not using a
    // regular expression search, because we want to filter out
    // matches that occur within HTML tags and script blocks, so
    // we have to do a little extra validation)

    var newText = "";
    var i = -1;
    var lcSearchTerm = searchTerm.toLowerCase();
    if (bodyText != null) {
        var lcBodyText = bodyText.toLowerCase();
        while (bodyText.length > 0) {
            i = lcBodyText.indexOf(lcSearchTerm, i + 1);
            if (i < 0) {
                newText += bodyText;
                bodyText = "";
            } else {
                // skip anything inside an HTML tag
                if (bodyText.lastIndexOf(">", i) >= bodyText.lastIndexOf("<", i)) {
                    // skip anything inside a <script> block
                    if (lcBodyText.lastIndexOf("/script>", i) >= lcBodyText.lastIndexOf("<script", i)) {
                        newText += bodyText.substring(0, i) + highlightStartTag + bodyText.substr(i, searchTerm.length) + highlightEndTag;
                        bodyText = bodyText.substr(i + searchTerm.length);
                        lcBodyText = bodyText.toLowerCase();
                        i = -1;
                    }
                }
            }
        }
    }
    return newText;
}
/*
* This is sort of a wrapper function to the doHighlight function.
* It takes the searchText that you pass, optionally splits it into
* separate words, and transforms the text on the current web page.
* Only the "searchText" parameter is required; all other parameters
* are optional and can be omitted.
*/
function highlightSearchTerms(searchText, treatAsPhrase, warnOnFailure, highlightStartTag, highlightEndTag) {
    // if the treatAsPhrase parameter is true, then we should search for 
    // the entire phrase that was entered; otherwise, we will split the
    // search string so that each word is searched for and highlighted
    // individually
    if (treatAsPhrase) {
        searchArray = [searchText];
    } else {
        searchArray = searchText.split(" ");
    }
    if (!document.body || typeof (document.body.innerHTML) == "undefined") {
        if (warnOnFailure) {
            alert("Sorry, for some reason the text of this page is unavailable. Searching will not work.");
        }
        return false;
    }
    // var bodyText = document.body.innerHTML;
    var bodyText = $("#article-content").html();    
    for (var i = 0; i < searchArray.length; i++) {
        bodyText = doHighlight(bodyText, searchArray[i], highlightStartTag, highlightEndTag);
    }
    // document.body.innerHTML = bodyText;
    $("#article-content").html(bodyText);
    return true;
}